Torque Specifications; Engine Oil Recommendations; Coolant Recommendations; Before Installation - Generac Power Systems 004992-0, 004992-1, 37kW NG, 40kW LP Owner's Manual

DANGER
Serious injury or damage may occur if not
!
configured properly. Please consult an author-
ized service dealer with any questions.

1.13 TORQUE SPECIFICATIONS

Tighten the bolts from the middle out, in a criss-
cross pattern.
Cylinder Head ....................................50 ft.lb./105 ft.lb./105 ft.lb.
Intake Manifold ....................................48 in.lb./84 in.lb./84 in.lb.
Exhaust Manifold..............................................................25 ft.lb.

1.14 ENGINE OIL RECOMMENDATIONS

The unit has been filled with 5W-20 engine oil at the
factory. Use a high-quality detergent oil classified "For
Service CC, SD, SE, SF ." Detergent oils keep the
engine cleaner and reduce carbon deposits. Use oil
having the following SAE viscosity rating, based on
the ambient temperature range anticipated before the
next oil change:
Temperature
Above 80° F (27° C)
32° to 80° F (-1° to 27° C)
Below 32° F (0° C)
Synthetic oil is highly recommended in any ele-
ment with temperatures above 90° F or below 30°
F .
Any attempt to crank or start the engine
!
before it has been properly serviced with the
recommended oil may result in an engine fail-
ure.

1.15 COOLANT RECOMMENDATIONS

Use a mixture of half low silicate ethylene glycol base
anti-freeze and half de-ionized water. Cooling system
capacity is about 20 U.S. quarts (19.3 liters). Use
only de-ionized water and only low silicate anti-
freeze. If desired, add a high quality rust inhibitor to
the recommended coolant mixture. When adding
coolant, always add the recommended 50-50 mix-
ture.
8 Generac ® Power Systems, Inc.
Section 2 — Installation
Guardian 40kW Liquid-cooled Generators
Oil Grade (Recommended)
SAE 15W-40
SAE 15W-40
SAE 15W-40
NOTE:
Do not use any chromate base rust inhibitor
!
with ethylene glycol base anti-freeze or
chromiumhydroxide ("green slime") forms and
will cause overheating. Engines that have
been operated with a chromate base rust
inhibitor must be chemically cleaned before
adding ethylene glycol base anti-freeze. Using
any high silicate anti-freeze boosters or addi-
tives will also cause overheating. It is also rec-
ommend that any soluble oil inhibitor is NOT
USED for this equipment.

1.16 BEFORE INSTALLATION

Before installing this equipment, check the ratings of
both the generator and the transfer switch. Read
"Emergency Isolation Method" and "Total Circuit
Isolation Method" in Sections 2.5 and 2.6.
The generator's rated wattage/amperage capacity
must be adequate to handle all electrical loads that
the unit will power. The critical (essential) loads may
need to be grouped together and wired into a sepa-
rate "emergency" distribution panel.
The standard transfer switch has no sensing or con-
trolling circuit boards. Instead, the generator control
console houses a "Printed Circuit Board Assembly",
which controls all phases of operation, including
engine start up and load transfer.
2.1 STANDBY GENERATOR
INSTALLATION
DANGER
Connecting this generator to an electrical sys-
tem normally supplied by an electric utility
shall be by means of a transfer switch, so as to
isolate the electric system from the utility distri-
bution system when the generator is operating.
Failure to isolate the electric system by these
means will result in damage to the generator
and may also result in injury or death to utility
workers due to backfeed of electrical energy.
If an open bottom is used, the engine-genera-
tor is to be installed over non-combustible
materials and should be located such that com-
bustible materials are not capable of accumu-
lating under the generator set.
Only qualified, competent installation contractors or
electricians thoroughly familiar with applicable
codes, standards and regulations should install this
standby electric power system. The installation must
comply strictly with all codes, standards and regula-
tions pertaining to the installation.